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- /*
- * PicoDrive
- * (C) notaz, 2009,2010,2013
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
- #include "../pico_int.h"
- #include "../sound/ym2612.h"
- #include <cpu/sh2/compiler.h>
- struct Pico32x Pico32x;
- SH2 sh2s[2];
- #define SH2_IDLE_STATES (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_RPOLL|SH2_STATE_SLEEP)
- static int REGPARM(2) sh2_irq_cb(SH2 *sh2, int level)
- {
- if (sh2->pending_irl > sh2->pending_int_irq) {
- elprintf_sh2(sh2, EL_32X, "ack/irl %d @ %08x",
- level, sh2_pc(sh2));
- return 64 + sh2->pending_irl / 2;
- } else {
- elprintf_sh2(sh2, EL_32X, "ack/int %d/%d @ %08x",
- level, sh2->pending_int_vector, sh2_pc(sh2));
- sh2->pending_int_irq = 0; // auto-clear
- sh2->pending_level = sh2->pending_irl;
- return sh2->pending_int_vector;
- }
- }
- // MUST specify active_sh2 when called from sh2 memhandlers
- void p32x_update_irls(SH2 *active_sh2, unsigned int m68k_cycles)
- {
- int irqs, mlvl = 0, slvl = 0;
- int mrun, srun;
- if (active_sh2 != NULL)
- m68k_cycles = sh2_cycles_done_m68k(active_sh2);
- // find top bit = highest irq number (0 <= irl <= 14/2) by binary search
- // msh2
- irqs = Pico32x.sh2irqs | Pico32x.sh2irqi[0];
- if (irqs >= 0x10) mlvl += 8, irqs >>= 4;
- if (irqs >= 0x04) mlvl += 4, irqs >>= 2;
- if (irqs >= 0x02) mlvl += 2, irqs >>= 1;
- // ssh2
- irqs = Pico32x.sh2irqs | Pico32x.sh2irqi[1];
- if (irqs >= 0x10) slvl += 8, irqs >>= 4;
- if (irqs >= 0x04) slvl += 4, irqs >>= 2;
- if (irqs >= 0x02) slvl += 2, irqs >>= 1;
- mrun = sh2_irl_irq(&msh2, mlvl, msh2.state & SH2_STATE_RUN);
- if (mrun) {
- p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, m68k_cycles);
- if (msh2.state & SH2_STATE_RUN)
- sh2_end_run(&msh2, 1);
- }
- srun = sh2_irl_irq(&ssh2, slvl, ssh2.state & SH2_STATE_RUN);
- if (srun) {
- p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, m68k_cycles);
- if (ssh2.state & SH2_STATE_RUN)
- sh2_end_run(&ssh2, 1);
- }
- elprintf(EL_32X, "update_irls: m %d/%d, s %d/%d", mlvl, mrun, slvl, srun);
- }
- // the mask register is inconsistent, CMD is supposed to be a mask,
- // while others are actually irq trigger enables?
- // TODO: test on hw..
- void p32x_trigger_irq(SH2 *sh2, unsigned int m68k_cycles, unsigned int mask)
- {
- Pico32x.sh2irqs |= mask & P32XI_VRES;
- Pico32x.sh2irqi[0] |= mask & (Pico32x.sh2irq_mask[0] << 3);
- Pico32x.sh2irqi[1] |= mask & (Pico32x.sh2irq_mask[1] << 3);
- p32x_update_irls(sh2, m68k_cycles);
- }
- void p32x_update_cmd_irq(SH2 *sh2, unsigned int m68k_cycles)
- {
- if ((Pico32x.sh2irq_mask[0] & 2) && (Pico32x.regs[2 / 2] & 1))
- Pico32x.sh2irqi[0] |= P32XI_CMD;
- else
- Pico32x.sh2irqi[0] &= ~P32XI_CMD;
- if ((Pico32x.sh2irq_mask[1] & 2) && (Pico32x.regs[2 / 2] & 2))
- Pico32x.sh2irqi[1] |= P32XI_CMD;
- else
- Pico32x.sh2irqi[1] &= ~P32XI_CMD;
- p32x_update_irls(sh2, m68k_cycles);
- }
- void Pico32xStartup(void)
- {
- elprintf(EL_STATUS|EL_32X, "32X startup");
- // TODO: OOM handling
- PicoIn.AHW |= PAHW_32X;
- sh2_init(&msh2, 0, &ssh2);
- msh2.irq_callback = sh2_irq_cb;
- sh2_init(&ssh2, 1, &msh2);
- ssh2.irq_callback = sh2_irq_cb;
- PicoMemSetup32x();
- p32x_pwm_ctl_changed();
- p32x_timers_recalc();
- Pico32x.sh2_regs[0] = P32XS2_ADEN;
- if (Pico.m.ncart_in)
- Pico32x.sh2_regs[0] |= P32XS_nCART;
- if (!Pico.m.pal)
- Pico32x.vdp_regs[0] |= P32XV_nPAL;
- rendstatus_old = -1;
- emu_32x_startup();
- }
- #define HWSWAP(x) (((x) << 16) | ((x) >> 16))
- void p32x_reset_sh2s(void)
- {
- elprintf(EL_32X, "sh2 reset");
- sh2_reset(&msh2);
- sh2_reset(&ssh2);
- sh2_peripheral_reset(&msh2);
- sh2_peripheral_reset(&ssh2);
- // if we don't have BIOS set, perform it's work here.
- // MSH2
- if (p32x_bios_m == NULL) {
- sh2_set_gbr(0, 0x20004000);
- if (!(PicoIn.AHW & PAHW_MCD)) {
- unsigned int idl_src, idl_dst, idl_size; // initial data load
- unsigned int vbr;
- // initial data
- idl_src = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d4)) & ~0xf0000000;
- idl_dst = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d8)) & ~0xf0000000;
- idl_size= HWSWAP(*(unsigned int *)(Pico.rom + 0x3dc));
- if (idl_size > Pico.romsize || idl_src + idl_size > Pico.romsize ||
- idl_size > 0x40000 || idl_dst + idl_size > 0x40000 || (idl_src & 3) || (idl_dst & 3)) {
- elprintf(EL_STATUS|EL_ANOMALY, "32x: invalid initial data ptrs: %06x -> %06x, %06x",
- idl_src, idl_dst, idl_size);
- }
- else
- memcpy(Pico32xMem->sdram + idl_dst, Pico.rom + idl_src, idl_size);
- // VBR
- vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3e8));
- sh2_set_vbr(0, vbr);
- // checksum and M_OK
- Pico32x.regs[0x28 / 2] = *(unsigned short *)(Pico.rom + 0x18e);
- }
- // program will set M_OK
- }
- // SSH2
- if (p32x_bios_s == NULL) {
- unsigned int vbr;
- // GBR/VBR
- vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3ec));
- sh2_set_gbr(1, 0x20004000);
- sh2_set_vbr(1, vbr);
- // program will set S_OK
- }
- msh2.m68krcycles_done = ssh2.m68krcycles_done = SekCyclesDone();
- }
- void Pico32xInit(void)
- {
- if (msh2.mult_m68k_to_sh2 == 0 || msh2.mult_sh2_to_m68k == 0)
- Pico32xSetClocks(PICO_MSH2_HZ, 0);
- if (ssh2.mult_m68k_to_sh2 == 0 || ssh2.mult_sh2_to_m68k == 0)
- Pico32xSetClocks(0, PICO_MSH2_HZ);
- }
- void PicoPower32x(void)
- {
- memset(&Pico32x, 0, sizeof(Pico32x));
- Pico32x.regs[0] = P32XS_REN|P32XS_nRES; // verified
- Pico32x.vdp_regs[0x0a/2] = P32XV_VBLK|P32XV_PEN;
- }
- void PicoUnload32x(void)
- {
- sh2_finish(&msh2);
- sh2_finish(&ssh2);
- if (Pico32xMem != NULL)
- plat_munmap(Pico32xMem, sizeof(*Pico32xMem));
- Pico32xMem = NULL;
- PicoIn.AHW &= ~PAHW_32X;
- }
- void PicoReset32x(void)
- {
- if (PicoIn.AHW & PAHW_32X) {
- p32x_trigger_irq(NULL, SekCyclesDone(), P32XI_VRES);
- p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, SekCyclesDone());
- p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, SekCyclesDone());
- p32x_pwm_ctl_changed();
- p32x_timers_recalc();
- }
- }
- static void p32x_start_blank(void)
- {
- if (Pico32xDrawMode != PDM32X_OFF && !PicoIn.skipFrame) {
- int offs, lines;
- pprof_start(draw);
- offs = 8; lines = 224;
- if ((Pico.video.reg[1] & 8) && !(PicoIn.opt & POPT_ALT_RENDERER)) {
- offs = 0;
- lines = 240;
- }
- // XXX: no proper handling of 32col mode..
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking
- (Pico.video.reg[12] & 1) && // 40col mode
- (!(Pico.video.debug_p & PVD_KILL_32X)))
- {
- int md_bg = Pico.video.reg[7] & 0x3f;
- // we draw full layer (not line-by-line)
- PicoDraw32xLayer(offs, lines, md_bg);
- }
- else if (Pico32xDrawMode != PDM32X_32X_ONLY)
- PicoDraw32xLayerMdOnly(offs, lines);
- pprof_end(draw);
- }
- // enter vblank
- Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
- // FB swap waits until vblank
- if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) {
- Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS;
- Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb;
- Pico32xSwapDRAM(Pico32x.pending_fb ^ 1);
- }
- p32x_trigger_irq(NULL, SekCyclesDone(), P32XI_VINT);
- p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, SekCyclesDone());
- p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, SekCyclesDone());
- }
- void p32x_schedule_hint(SH2 *sh2, unsigned int m68k_cycles)
- {
- // rather rough, 32x hint is useless in practice
- int after;
- if (!((Pico32x.sh2irq_mask[0] | Pico32x.sh2irq_mask[1]) & 4))
- return; // nobody cares
- // note: when Pico.m.scanline is 224, SH2s might
- // still be at scanline 93 (or so)
- if (!(Pico32x.sh2_regs[0] & 0x80) &&
- Pico.m.scanline > (Pico.video.reg[1] & 0x08 ? 240 : 224))
- return;
- after = (Pico32x.sh2_regs[4 / 2] + 1) * 488;
- if (sh2 != NULL)
- p32x_event_schedule_sh2(sh2, P32X_EVENT_HINT, after);
- else
- p32x_event_schedule(m68k_cycles, P32X_EVENT_HINT, after);
- }
- /* events */
- static void fillend_event(unsigned int now)
- {
- Pico32x.vdp_regs[0x0a/2] &= ~P32XV_nFEN;
- p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, now);
- p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, now);
- }
- static void hint_event(unsigned int now)
- {
- p32x_trigger_irq(NULL, now, P32XI_HINT);
- p32x_schedule_hint(NULL, now);
- }
- typedef void (event_cb)(unsigned int now);
- /* times are in m68k (7.6MHz) cycles */
- unsigned int p32x_event_times[P32X_EVENT_COUNT];
- static unsigned int event_time_next;
- static event_cb *p32x_event_cbs[P32X_EVENT_COUNT] = {
- p32x_pwm_irq_event, // P32X_EVENT_PWM
- fillend_event, // P32X_EVENT_FILLEND
- hint_event, // P32X_EVENT_HINT
- };
- // schedule event at some time 'after', in m68k clocks
- void p32x_event_schedule(unsigned int now, enum p32x_event event, int after)
- {
- unsigned int when;
- when = (now + after) | 1;
- elprintf(EL_32X, "32x: new event #%u %u->%u", event, now, when);
- p32x_event_times[event] = when;
- if (event_time_next == 0 || CYCLES_GT(event_time_next, when))
- event_time_next = when;
- }
- void p32x_event_schedule_sh2(SH2 *sh2, enum p32x_event event, int after)
- {
- unsigned int now = sh2_cycles_done_m68k(sh2);
- int left_to_next;
- p32x_event_schedule(now, event, after);
- left_to_next = C_M68K_TO_SH2(sh2, (int)(event_time_next - now));
- if (sh2_cycles_left(sh2) > left_to_next) {
- if (left_to_next < 1)
- left_to_next = 1;
- sh2_end_run(sh2, left_to_next);
- }
- }
- static void p32x_run_events(unsigned int until)
- {
- int oldest, oldest_diff, time;
- int i, diff;
- while (1) {
- oldest = -1, oldest_diff = 0x7fffffff;
- for (i = 0; i < P32X_EVENT_COUNT; i++) {
- if (p32x_event_times[i]) {
- diff = p32x_event_times[i] - until;
- if (diff < oldest_diff) {
- oldest_diff = diff;
- oldest = i;
- }
- }
- }
- if (oldest_diff <= 0) {
- time = p32x_event_times[oldest];
- p32x_event_times[oldest] = 0;
- elprintf(EL_32X, "32x: run event #%d %u", oldest, time);
- p32x_event_cbs[oldest](time);
- }
- else if (oldest_diff < 0x7fffffff) {
- event_time_next = p32x_event_times[oldest];
- break;
- }
- else {
- event_time_next = 0;
- break;
- }
- }
- if (oldest != -1)
- elprintf(EL_32X, "32x: next event #%d at %u",
- oldest, event_time_next);
- }
- static void run_sh2(SH2 *sh2, unsigned int m68k_cycles)
- {
- unsigned int cycles, done;
- pevt_log_sh2_o(sh2, EVT_RUN_START);
- sh2->state |= SH2_STATE_RUN;
- cycles = C_M68K_TO_SH2(sh2, m68k_cycles);
- elprintf_sh2(sh2, EL_32X, "+run %u %d @%08x",
- sh2->m68krcycles_done, cycles, sh2->pc);
- done = sh2_execute(sh2, cycles);
- sh2->m68krcycles_done += C_SH2_TO_M68K(sh2, done);
- sh2->state &= ~SH2_STATE_RUN;
- pevt_log_sh2_o(sh2, EVT_RUN_END);
- elprintf_sh2(sh2, EL_32X, "-run %u %d",
- sh2->m68krcycles_done, done);
- }
- // sync other sh2 to this one
- // note: recursive call
- void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target)
- {
- SH2 *osh2 = sh2->other_sh2;
- int left_to_event;
- int m68k_cycles;
- if (osh2->state & SH2_STATE_RUN)
- return;
- m68k_cycles = m68k_target - osh2->m68krcycles_done;
- if (m68k_cycles < 200)
- return;
- if (osh2->state & SH2_IDLE_STATES) {
- osh2->m68krcycles_done = m68k_target;
- return;
- }
- elprintf_sh2(osh2, EL_32X, "sync to %u %d",
- m68k_target, m68k_cycles);
- run_sh2(osh2, m68k_cycles);
- // there might be new event to schedule current sh2 to
- if (event_time_next) {
- left_to_event = C_M68K_TO_SH2(sh2, (int)(event_time_next - m68k_target));
- if (sh2_cycles_left(sh2) > left_to_event) {
- if (left_to_event < 1)
- left_to_event = 1;
- sh2_end_run(sh2, left_to_event);
- }
- }
- }
- #define STEP_LS 24
- #define STEP_N 528 // at least one line (488)
- #define sync_sh2s_normal p32x_sync_sh2s
- //#define sync_sh2s_lockstep p32x_sync_sh2s
- /* most timing is in 68k clock */
- void sync_sh2s_normal(unsigned int m68k_target)
- {
- unsigned int now, target, next, timer_cycles;
- int cycles;
- elprintf(EL_32X, "sh2 sync to %u", m68k_target);
- if (!(Pico32x.regs[0] & P32XS_nRES)) {
- msh2.m68krcycles_done = ssh2.m68krcycles_done = m68k_target;
- return; // rare
- }
- now = msh2.m68krcycles_done;
- if (CYCLES_GT(now, ssh2.m68krcycles_done))
- now = ssh2.m68krcycles_done;
- timer_cycles = now;
- pprof_start(m68k);
- while (CYCLES_GT(m68k_target, now))
- {
- if (event_time_next && CYCLES_GE(now, event_time_next))
- p32x_run_events(now);
- target = m68k_target;
- if (event_time_next && CYCLES_GT(target, event_time_next))
- target = event_time_next;
- while (CYCLES_GT(target, now))
- {
- next = target;
- if (CYCLES_GT(target, now + STEP_N))
- next = now + STEP_N;
- elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", next,
- next - msh2.m68krcycles_done, next - ssh2.m68krcycles_done,
- m68k_target - now, Pico32x.emu_flags);
- pprof_start(ssh2);
- if (!(ssh2.state & SH2_IDLE_STATES)) {
- cycles = next - ssh2.m68krcycles_done;
- if (cycles > 0) {
- run_sh2(&ssh2, cycles > 20U ? cycles : 20U);
- if (event_time_next && CYCLES_GT(target, event_time_next))
- target = event_time_next;
- if (CYCLES_GT(next, target))
- next = target;
- }
- }
- pprof_end(ssh2);
- pprof_start(msh2);
- if (!(msh2.state & SH2_IDLE_STATES)) {
- cycles = next - msh2.m68krcycles_done;
- if (cycles > 0) {
- run_sh2(&msh2, cycles > 20U ? cycles : 20U);
- if (event_time_next && CYCLES_GT(target, event_time_next))
- target = event_time_next;
- if (CYCLES_GT(next, target))
- next = target;
- }
- }
- pprof_end(msh2);
- now = next;
- if (CYCLES_GT(now, msh2.m68krcycles_done)) {
- if (!(msh2.state & SH2_IDLE_STATES))
- now = msh2.m68krcycles_done;
- }
- if (CYCLES_GT(now, ssh2.m68krcycles_done)) {
- if (!(ssh2.state & SH2_IDLE_STATES))
- now = ssh2.m68krcycles_done;
- }
- if (CYCLES_GT(now, timer_cycles+STEP_N)) {
- if (msh2.state & SH2_TIMER_RUN)
- p32x_timer_do(&msh2, now - timer_cycles);
- if (ssh2.state & SH2_TIMER_RUN)
- p32x_timer_do(&ssh2, now - timer_cycles);
- timer_cycles = now;
- }
- }
- if (msh2.state & SH2_TIMER_RUN)
- p32x_timer_do(&msh2, now - timer_cycles);
- if (ssh2.state & SH2_TIMER_RUN)
- p32x_timer_do(&ssh2, now - timer_cycles);
- timer_cycles = now;
- }
- pprof_end_sub(m68k);
- // advance idle CPUs
- if (msh2.state & SH2_IDLE_STATES) {
- if (CYCLES_GT(m68k_target, msh2.m68krcycles_done))
- msh2.m68krcycles_done = m68k_target;
- }
- if (ssh2.state & SH2_IDLE_STATES) {
- if (CYCLES_GT(m68k_target, ssh2.m68krcycles_done))
- ssh2.m68krcycles_done = m68k_target;
- }
- // everyone is in sync now
- Pico32x.comm_dirty = 0;
- }
- void sync_sh2s_lockstep(unsigned int m68k_target)
- {
- unsigned int mcycles;
-
- mcycles = msh2.m68krcycles_done;
- if (ssh2.m68krcycles_done < mcycles)
- mcycles = ssh2.m68krcycles_done;
- while (mcycles < m68k_target) {
- mcycles += STEP_LS;
- sync_sh2s_normal(mcycles);
- }
- }
- #define CPUS_RUN(m68k_cycles) do { \
- if (PicoIn.AHW & PAHW_MCD) \
- pcd_run_cpus(m68k_cycles); \
- else \
- SekRunM68k(m68k_cycles); \
- \
- if ((Pico32x.emu_flags & P32XF_Z80_32X_IO) && Pico.m.z80Run \
- && !Pico.m.z80_reset && (PicoIn.opt & POPT_EN_Z80)) \
- PicoSyncZ80(SekCyclesDone()); \
- if (Pico32x.emu_flags & (P32XF_68KCPOLL|P32XF_68KVPOLL)) \
- p32x_sync_sh2s(SekCyclesDone()); \
- } while (0)
- #define PICO_32X
- #define PICO_CD
- #include "../pico_cmn.c"
- void PicoFrame32x(void)
- {
- sh2_execute_prepare(&msh2, PicoIn.opt & POPT_EN_DRC);
- sh2_execute_prepare(&ssh2, PicoIn.opt & POPT_EN_DRC);
- Pico.m.scanline = 0;
- Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
- if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
- Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
- if (!(Pico32x.sh2_regs[0] & 0x80))
- p32x_schedule_hint(NULL, SekCyclesDone());
- p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, SekCyclesDone());
- p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, SekCyclesDone());
- if (PicoIn.AHW & PAHW_MCD)
- pcd_prepare_frame();
- PicoFrameStart();
- PicoFrameHints();
- elprintf(EL_32X, "poll: %02x %02x %02x",
- Pico32x.emu_flags & 3, msh2.state, ssh2.state);
- }
- // calculate multipliers against 68k clock (7670442)
- // normally * 3, but effectively slower due to high latencies everywhere
- // however using something lower breaks MK2 animations
- void Pico32xSetClocks(int msh2_hz, int ssh2_hz)
- {
- float m68k_clk = (float)(OSC_NTSC / 7);
- if (msh2_hz > 0) {
- msh2.mult_m68k_to_sh2 = (int)((float)msh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
- msh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)msh2_hz);
- }
- if (ssh2_hz > 0) {
- ssh2.mult_m68k_to_sh2 = (int)((float)ssh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
- ssh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)ssh2_hz);
- }
- }
- void Pico32xStateLoaded(int is_early)
- {
- if (is_early) {
- Pico32xMemStateLoaded();
- return;
- }
- sh2s[0].m68krcycles_done = sh2s[1].m68krcycles_done = SekCyclesDone();
- p32x_update_irls(NULL, SekCyclesDone());
- p32x_pwm_state_loaded();
- p32x_run_events(SekCyclesDone());
- }
- // vim:shiftwidth=2:ts=2:expandtab
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